TCP chat attaching cipher is not running

Hi,
I did TCP chat no problem and I attached cipher and It no run. What is wrong on my code.

Code :

---

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.Security;
import java.security.spec.AlgorithmParameterSpec;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
 
/**
 *
 * @author Lolek
 */
public class Main {
 
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
 
        String adresaIP;
        if(args.length==0)
        {
            adresaIP="127.0.0.1";
        }
        else
        {
            adresaIP=args[0];
        }
        PrijemVlakno prijimat = new PrijemVlakno();
        OdeslatVlakno odeslat = new OdeslatVlakno(adresaIP);
 
        prijimat.server.start();
        odeslat.klient.start();
    }
 
}
 
class PrijemVlakno implements Runnable
{
  Thread server;  
 
  public PrijemVlakno()
  {
 
      server = new Thread(this,"Server vlakno");
  }
  public void run()
  {
        try {
 
            Security.addProvider(new BouncyCastleProvider());
            SecretKeySpec key = new SecretKeySpec("1234567891234567".getBytes("UTF-8"), "AES");
            AlgorithmParameterSpec iv = new IvParameterSpec("4567891234567AAA".getBytes("UTF-8"));
 
            String nameAlgorithm = "AES/ECB/PKCS7Padding";                
            Cipher decryption = Cipher.getInstance(nameAlgorithm);
            decryption.init(Cipher.DECRYPT_MODE, key); 
 
            ServerSocket serverSocket = new ServerSocket(4000);
            Socket clientSocket = null;
            clientSocket = serverSocket.accept();
 
            while(true)
            {   
                CipherInputStream cip = new CipherInputStream(clientSocket.getInputStream(),decryption);
                BufferedReader cteni = new BufferedReader(new InputStreamReader(cip));
                String radek = null;
                    while((radek = cteni.readLine())!=null)
                    {
                        System.out.println(radek);
                        System.out.flush();
                    }
            }
 
        } catch (InvalidKeyException ex) {
            Logger.getLogger(PrijemVlakno.class.getName()).log(Level.SEVERE, null, ex);
        } catch (NoSuchAlgorithmException ex) {
            Logger.getLogger(PrijemVlakno.class.getName()).log(Level.SEVERE, null, ex);
        } catch (NoSuchPaddingException ex) {
            Logger.getLogger(PrijemVlakno.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(PrijemVlakno.class.getName()).log(Level.SEVERE, null, ex);
        }
 
 
  }
}
 
class OdeslatVlakno implements Runnable
{   
    private String adresaIP;  
    Thread klient;
    private Socket socket;
    public OdeslatVlakno(String ip)
    {   
        this.adresaIP=ip;
        klient = new Thread(this,"Klient Vlakno");
    }
    public void run()
    {
        try {          
            try{
             while (true) {
                 try {
                        socket = new Socket(this.adresaIP, 5000);
                        break;
                     }
                catch (IOException e) {                       
                        Thread.sleep(1000);
                    }
                }
            }
            catch (InterruptedException e) {
                return;
            } 
 
 
 
            Security.addProvider(new BouncyCastleProvider());
            SecretKeySpec key = new SecretKeySpec("1234567891234567".getBytes("UTF-8"), "AES");
            AlgorithmParameterSpec iv = new IvParameterSpec("4567891234567AAA".getBytes("UTF-8"));
 
            String nameAlgorithm = "AES/ECB/PKCS7Padding";
            Cipher cipher = Cipher.getInstance(nameAlgorithm);
            cipher.init(Cipher.ENCRYPT_MODE, key);
 
            BufferedReader klavesnice = new BufferedReader(new InputStreamReader(System.in));
            OutputStream vystup = socket.getOutputStream();
            CipherOutputStream cip = new CipherOutputStream(vystup,cipher);
            BufferedWriter zapis = new BufferedWriter(new OutputStreamWriter(cip));
 
            String radek;
            while ((radek = klavesnice.readLine())!=null)
            {   
 
                zapis.write(radek);
                zapis.newLine();
                zapis.flush();
 
                System.out.println("Cteni radku:"+radek);
            }
        } 
        catch (InvalidKeyException ex) {
            Logger.getLogger(OdeslatVlakno.class.getName()).log(Level.SEVERE, null, ex);
        }        catch (NoSuchAlgorithmException ex) {
            Logger.getLogger(OdeslatVlakno.class.getName()).log(Level.SEVERE, null, ex);
        } catch (NoSuchPaddingException ex) {
            Logger.getLogger(OdeslatVlakno.class.getName()).log(Level.SEVERE, null, ex);
        }               catch (IOException ex) {
            Logger.getLogger(OdeslatVlakno.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}

---

Hello Koren3,

What error messages are you getting when running this code?

No error, but another client doesn´t recive message.

I don´t know what is problem...

I know, where was a problem. I used block cipher. But I use stream cipher and it write this error: java.security.InvalidKeyException: no IV set when one expected. If i use stream cipher i don't need IV. I think. Where is the problem thank you.

My code:

Code :

---

 Security.addProvider(new BouncyCastleProvider());
            SecretKeySpec key = new SecretKeySpec("1234567891234567".getBytes("UTF-8"), "Salsa20");
 
            String nameAlgorithm = "Salsa20";                
            Cipher decryption = Cipher.getInstance(nameAlgorithm);
            decryption.init(Cipher.DECRYPT_MODE, key);

---